blob: e04d0e09ee7b59d5959d69e5df872a5871e9ae64 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
David Teiglandb3b94fa2006-01-16 16:50:04 +000010#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
14#include <linux/module.h>
15#include <linux/init.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050016#include <linux/gfs2_ondisk.h>
Steven Whitehousebc015cb2011-01-19 09:30:01 +000017#include <linux/rcupdate.h>
18#include <linux/rculist_bl.h>
Arun Sharma600634972011-07-26 16:09:06 -070019#include <linux/atomic.h>
Steven Whitehouse75ca61c2012-03-08 12:10:23 +000020#include <linux/mempool.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000021
22#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050023#include "incore.h"
Steven Whitehouseb2760582008-10-14 16:05:55 +010024#include "super.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000025#include "sys.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050026#include "util.h"
Steven Whitehouse85d1da62006-09-07 14:40:21 -040027#include "glock.h"
Abhijith Das0a7ab792009-01-07 16:03:37 -060028#include "quota.h"
Tejun Heo6ecd7c22010-07-20 22:09:02 +020029#include "recovery.h"
Steven Whitehouse8d123582010-09-17 12:30:23 +010030#include "dir.h"
Abhijith Das0a7ab792009-01-07 16:03:37 -060031
David Teiglande0c2a9a2012-01-09 17:18:05 -050032struct workqueue_struct *gfs2_control_wq;
33
Abhijith Das0a7ab792009-01-07 16:03:37 -060034static struct shrinker qd_shrinker = {
35 .shrink = gfs2_shrink_qd_memory,
36 .seeks = DEFAULT_SEEKS,
37};
David Teiglandb3b94fa2006-01-16 16:50:04 +000038
Alexey Dobriyan51cc5062008-07-25 19:45:34 -070039static void gfs2_init_inode_once(void *foo)
Steven Whitehouse320dd102006-05-18 16:25:27 -040040{
41 struct gfs2_inode *ip = foo;
Christoph Lametera35afb82007-05-16 22:10:57 -070042
43 inode_init_once(&ip->i_inode);
Christoph Lametera35afb82007-05-16 22:10:57 -070044 init_rwsem(&ip->i_rw_mutex);
Steven Whitehouse813e0c42008-11-18 13:38:48 +000045 INIT_LIST_HEAD(&ip->i_trunc_list);
Bob Peterson564e12b2011-11-21 13:36:17 -050046 ip->i_res = NULL;
Steven Whitehouse17d539f2011-06-15 10:29:37 +010047 ip->i_hash_cache = NULL;
Steven Whitehouse320dd102006-05-18 16:25:27 -040048}
49
Alexey Dobriyan51cc5062008-07-25 19:45:34 -070050static void gfs2_init_glock_once(void *foo)
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040051{
52 struct gfs2_glock *gl = foo;
Christoph Lametera35afb82007-05-16 22:10:57 -070053
Steven Whitehousebc015cb2011-01-19 09:30:01 +000054 INIT_HLIST_BL_NODE(&gl->gl_list);
Christoph Lametera35afb82007-05-16 22:10:57 -070055 spin_lock_init(&gl->gl_spin);
56 INIT_LIST_HEAD(&gl->gl_holders);
Steven Whitehouse97cc10252008-11-20 13:39:47 +000057 INIT_LIST_HEAD(&gl->gl_lru);
Christoph Lametera35afb82007-05-16 22:10:57 -070058 INIT_LIST_HEAD(&gl->gl_ail_list);
59 atomic_set(&gl->gl_ail_count, 0);
Steven Whitehousef42ab082011-04-14 16:50:31 +010060 atomic_set(&gl->gl_revokes, 0);
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040061}
62
Steven Whitehouse009d8512009-12-08 12:12:13 +000063static void gfs2_init_gl_aspace_once(void *foo)
64{
65 struct gfs2_glock *gl = foo;
66 struct address_space *mapping = (struct address_space *)(gl + 1);
67
68 gfs2_init_glock_once(gl);
Miklos Szeredi2aa15892011-02-23 13:49:47 +010069 address_space_init_once(mapping);
Steven Whitehouse009d8512009-12-08 12:12:13 +000070}
71
David Teiglandb3b94fa2006-01-16 16:50:04 +000072/**
73 * init_gfs2_fs - Register GFS2 as a filesystem
74 *
75 * Returns: 0 on success, error code on failure
76 */
77
78static int __init init_gfs2_fs(void)
79{
80 int error;
81
Steven Whitehouse8d123582010-09-17 12:30:23 +010082 gfs2_str2qstr(&gfs2_qdot, ".");
83 gfs2_str2qstr(&gfs2_qdotdot, "..");
84
David Teiglandb3b94fa2006-01-16 16:50:04 +000085 error = gfs2_sys_init();
86 if (error)
87 return error;
88
Steven Whitehouse85d1da62006-09-07 14:40:21 -040089 error = gfs2_glock_init();
90 if (error)
91 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +000092
Steven Whitehouse85d1da62006-09-07 14:40:21 -040093 error = -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +000094 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
95 sizeof(struct gfs2_glock),
Steven Whitehouse907b9bc2006-09-25 09:26:04 -040096 0, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +090097 gfs2_init_glock_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +000098 if (!gfs2_glock_cachep)
99 goto fail;
100
Steven Whitehouse7c9a84a2010-03-12 17:05:31 +0000101 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
Steven Whitehouse009d8512009-12-08 12:12:13 +0000102 sizeof(struct gfs2_glock) +
103 sizeof(struct address_space),
104 0, 0, gfs2_init_gl_aspace_once);
105
106 if (!gfs2_glock_aspace_cachep)
107 goto fail;
108
David Teiglandb3b94fa2006-01-16 16:50:04 +0000109 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
110 sizeof(struct gfs2_inode),
Alexey Dobriyaneb1dc332006-10-28 03:03:48 +0400111 0, SLAB_RECLAIM_ACCOUNT|
112 SLAB_MEM_SPREAD,
Paul Mundt20c2df82007-07-20 10:11:58 +0900113 gfs2_init_inode_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000114 if (!gfs2_inode_cachep)
115 goto fail;
116
117 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
118 sizeof(struct gfs2_bufdata),
Paul Mundt20c2df82007-07-20 10:11:58 +0900119 0, 0, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000120 if (!gfs2_bufdata_cachep)
121 goto fail;
122
Bob Peterson6bdd9be2008-01-28 17:20:26 -0600123 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
124 sizeof(struct gfs2_rgrpd),
125 0, 0, NULL);
126 if (!gfs2_rgrpd_cachep)
127 goto fail;
128
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000129 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
130 sizeof(struct gfs2_quota_data),
131 0, 0, NULL);
132 if (!gfs2_quotad_cachep)
133 goto fail;
134
Bob Peterson36f55802012-04-11 12:59:32 -0400135 gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk",
136 sizeof(struct gfs2_blkreserv),
137 0, 0, NULL);
138 if (!gfs2_rsrv_cachep)
139 goto fail;
140
Abhijith Das0a7ab792009-01-07 16:03:37 -0600141 register_shrinker(&qd_shrinker);
142
David Teiglandb3b94fa2006-01-16 16:50:04 +0000143 error = register_filesystem(&gfs2_fs_type);
144 if (error)
145 goto fail;
146
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500147 error = register_filesystem(&gfs2meta_fs_type);
148 if (error)
149 goto fail_unregister;
150
Tejun Heo6ecd7c22010-07-20 22:09:02 +0200151 error = -ENOMEM;
152 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
Tejun Heo58a69cb2011-02-16 09:25:31 +0100153 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
Tejun Heo6ecd7c22010-07-20 22:09:02 +0200154 if (!gfs_recovery_wq)
155 goto fail_wq;
Steven Whitehousefe64d512009-05-19 10:01:18 +0100156
David Teiglande0c2a9a2012-01-09 17:18:05 -0500157 gfs2_control_wq = alloc_workqueue("gfs2_control",
158 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_FREEZABLE, 0);
159 if (!gfs2_control_wq)
Steven Whitehouse75ca61c2012-03-08 12:10:23 +0000160 goto fail_recovery;
161
Steven Whitehousee8c92ed2012-04-16 09:28:31 +0100162 gfs2_page_pool = mempool_create_page_pool(64, 0);
163 if (!gfs2_page_pool)
David Teiglande0c2a9a2012-01-09 17:18:05 -0500164 goto fail_control;
165
Robert Peterson7c52b162007-03-16 10:26:37 +0000166 gfs2_register_debugfs();
167
Michal Marek8d2c50e2011-04-01 12:41:20 +0200168 printk("GFS2 installed\n");
David Teiglandb3b94fa2006-01-16 16:50:04 +0000169
170 return 0;
171
David Teiglande0c2a9a2012-01-09 17:18:05 -0500172fail_control:
Steven Whitehouse75ca61c2012-03-08 12:10:23 +0000173 destroy_workqueue(gfs2_control_wq);
174fail_recovery:
David Teiglande0c2a9a2012-01-09 17:18:05 -0500175 destroy_workqueue(gfs_recovery_wq);
Tejun Heo6ecd7c22010-07-20 22:09:02 +0200176fail_wq:
Steven Whitehousefe64d512009-05-19 10:01:18 +0100177 unregister_filesystem(&gfs2meta_fs_type);
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500178fail_unregister:
179 unregister_filesystem(&gfs2_fs_type);
180fail:
Abhijith Das0a7ab792009-01-07 16:03:37 -0600181 unregister_shrinker(&qd_shrinker);
Steven Whitehouse8fbbfd22007-08-01 13:57:10 +0100182 gfs2_glock_exit();
183
Bob Peterson36f55802012-04-11 12:59:32 -0400184 if (gfs2_rsrv_cachep)
185 kmem_cache_destroy(gfs2_rsrv_cachep);
186
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000187 if (gfs2_quotad_cachep)
188 kmem_cache_destroy(gfs2_quotad_cachep);
189
Bob Peterson6bdd9be2008-01-28 17:20:26 -0600190 if (gfs2_rgrpd_cachep)
191 kmem_cache_destroy(gfs2_rgrpd_cachep);
192
David Teiglandb3b94fa2006-01-16 16:50:04 +0000193 if (gfs2_bufdata_cachep)
194 kmem_cache_destroy(gfs2_bufdata_cachep);
195
196 if (gfs2_inode_cachep)
197 kmem_cache_destroy(gfs2_inode_cachep);
198
Steven Whitehouse009d8512009-12-08 12:12:13 +0000199 if (gfs2_glock_aspace_cachep)
200 kmem_cache_destroy(gfs2_glock_aspace_cachep);
201
David Teiglandb3b94fa2006-01-16 16:50:04 +0000202 if (gfs2_glock_cachep)
203 kmem_cache_destroy(gfs2_glock_cachep);
204
205 gfs2_sys_uninit();
206 return error;
207}
208
209/**
210 * exit_gfs2_fs - Unregister the file system
211 *
212 */
213
214static void __exit exit_gfs2_fs(void)
215{
Abhijith Das0a7ab792009-01-07 16:03:37 -0600216 unregister_shrinker(&qd_shrinker);
Steven Whitehouse8fbbfd22007-08-01 13:57:10 +0100217 gfs2_glock_exit();
Robert Peterson7c52b162007-03-16 10:26:37 +0000218 gfs2_unregister_debugfs();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000219 unregister_filesystem(&gfs2_fs_type);
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500220 unregister_filesystem(&gfs2meta_fs_type);
Tejun Heo6ecd7c22010-07-20 22:09:02 +0200221 destroy_workqueue(gfs_recovery_wq);
David Teiglande0c2a9a2012-01-09 17:18:05 -0500222 destroy_workqueue(gfs2_control_wq);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000223
Steven Whitehousebc015cb2011-01-19 09:30:01 +0000224 rcu_barrier();
225
Steven Whitehousee8c92ed2012-04-16 09:28:31 +0100226 mempool_destroy(gfs2_page_pool);
Bob Peterson36f55802012-04-11 12:59:32 -0400227 kmem_cache_destroy(gfs2_rsrv_cachep);
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000228 kmem_cache_destroy(gfs2_quotad_cachep);
Bob Peterson6bdd9be2008-01-28 17:20:26 -0600229 kmem_cache_destroy(gfs2_rgrpd_cachep);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000230 kmem_cache_destroy(gfs2_bufdata_cachep);
231 kmem_cache_destroy(gfs2_inode_cachep);
Steven Whitehouse009d8512009-12-08 12:12:13 +0000232 kmem_cache_destroy(gfs2_glock_aspace_cachep);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000233 kmem_cache_destroy(gfs2_glock_cachep);
234
235 gfs2_sys_uninit();
236}
237
238MODULE_DESCRIPTION("Global File System");
239MODULE_AUTHOR("Red Hat, Inc.");
240MODULE_LICENSE("GPL");
241
242module_init(init_gfs2_fs);
243module_exit(exit_gfs2_fs);
244